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Thermoform cannula with variable cannula body stiffness

a cannula and variable technology, applied in the field of cannula with variable cannula body stiffness, can solve the problems of difficult backloading and insertion of the cannula and the pump assembly into the patient, and achieve the effect of efficient positioning

Active Publication Date: 2017-08-03
ABIOMED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention is a cannula for a percutaneous pump system that has different flexural moduli in different parts to allow for easy placement without displacing a guidewire. The cannula is flexible at the distal end to follow the guidewire and stiff at the proximal end to guide it into place. The stiffness of the cannula is achieved by making the proximal section stiffer than the distal section. The improved cannula helps to reduce the force required for insertion, which reduces the likelihood of kinking or buckling of the cannula. It also improves adaptability and conformance to the anatomy of a patient and can better accommodate larger tolerances. Overall, the improved cannula improves the efficiency and effectiveness of the pump system.

Problems solved by technology

However, commonly used cannulas of the pump assembly have a tortuous shape, and in some situations the cannula stiffness may prevent the cannula from advancing distally over the guidewire without displacing the guidewire or without extending the length of the procedure.
This can make backloading and insertion of the cannula and pump assembly into a patient particularly difficult.

Method used

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  • Thermoform cannula with variable cannula body stiffness
  • Thermoform cannula with variable cannula body stiffness
  • Thermoform cannula with variable cannula body stiffness

Examples

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Embodiment Construction

[0049]To provide an overall understanding of the systems, methods, and devices described herein, certain illustrative embodiments will be described. Although the embodiments and features described herein are specifically described for use in connection with a percutaneous blood pump system for the right heart, it will be understood that all the components and other features outlined below may be combined with one another in any suitable manner and may be adapted and applied to blood pump systems for the left heart, left ventricle, or other types of cardiac therapy and cardiac assist devices, including balloon pumps, cardiac assist devices implanted using a surgical incision, and the like. Examples of specific implementations and applications are provided primarily for illustrative purposes.

[0050]The systems, methods, and devices described herein provide an improved cannula that is configured to facilitate backloading of the cannula into the arterial system of a patient over a guidew...

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Abstract

A cannula supporting a percutaneous pump can include a proximal section with a first flexural modulus. The cannula can include one or more distal sections with a flexural modulus that is different than the first flexural modulus. The material and its arrangement along the length of the cannula can be selected so as to influence bending properties. This can, for example, allow efficient positioning of the cannula in a desired location without displacing the guidewire.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application relates to U.S. Pat. No. 6,007,478, for a cannula having constant wall thickness with increasing distal flexibility, the content of which is hereby incorporated herein by reference in its entirety. This application claims priority to U.S. provisional application No. 62 / 288,914, filed Jan. 29, 2016, the content of which is hereby incorporated herein by reference in its entirety.BACKGROUND[0002]A blood pump assembly is introduced in the circulatory system to deliver blood between locations in the circulatory system or heart. For example, when the blood pump assembly is deployed in the arterial system the blood pump assembly pulls blood from the left ventricle of the heart and expels the blood into the aorta. In another example, when the blood pump is deployed in the venous system, the blood pump pulls blood from the inferior vena cava, or pulls blood from the right atrium of the heart or the superior vena cava, and expels t...

Claims

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Application Information

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IPC IPC(8): A61B17/34A61M1/10A61M1/12A61M60/135A61M60/216A61M60/408A61M60/857
CPCA61B17/3423A61M1/122A61M1/1029A61B2017/00955A61B17/3439A61B2017/3425A61B17/3468A61M25/0045A61M25/0054A61M25/005A61M60/857A61M60/135A61M60/408A61M60/216A61M60/148A61M60/174
Inventor TAO, ZHENGHONGZARINS, CHRISTOPHERMRAZ, DIONVAUGHAN, STEPHENBECKER, JULIUS STEVEN
Owner ABIOMED
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